I'm Ivan, the developer of FluidEQ. The Mac beta applies system-wide EQ through its own engine, with OPRA headphone profiles from AutoEq, oratory1990 and other contributors, plus imported/saved curves and EQ presets.
Free and open source (GPL-3.0-or-later); extra gallery visualizer scenes are optional one-time purchases. Requires Apple Silicon (M1 or later) and macOS 14.4+. This beta is not notarized by Apple yet, and macOS asks for system-audio capture permission.
Built with substantial AI assistance, with human direction and testing.
Website: https://fluideq.com
Source, Mac download and setup: https://github.com/StartSWest/FluidEQ/releases/tag/mac-v2.2.2
Feedback on headphone correction and playback on your Mac is welcome.
FluidEQ — full app and Amp player.